From fph at clouddancer.com  Thu Sep  6 22:16:17 2007
From: fph at clouddancer.com (GP lisper)
Date: Thu,  6 Sep 2007 15:16:17 -0700 (PDT)
Subject: [Pal-devel] Screen Capture Function
Message-ID: <20070906221617.7BFAF20C13A@mail.clouddancer.com>


Hi, I saw the announcement for PAL, but only now can I spend some time
on it.  I would be interested in being able to get a framebuffer
capture without needing an external third party program (or anyone
present at the keyboard).  A quick look over the html manual doesn't
show a heading with that capability, anything planned?  Seems like
some of the graphical state functions could be `adjusted to this
feature.

TIA
r



From flatlander at yellow-hut.com  Fri Sep  7 07:45:49 2007
From: flatlander at yellow-hut.com (Tomi Neste)
Date: Fri, 07 Sep 2007 10:45:49 +0300
Subject: [Pal-devel] Screen Capture Function
In-Reply-To: <20070906221617.7BFAF20C13A@mail.clouddancer.com>
References: <20070906221617.7BFAF20C13A@mail.clouddancer.com>
Message-ID: <op.tx9w6ntzu6rk5c@otto>

GP lisper <fph at clouddancer.com> kirjoitti Fri, 07 Sep 2007 01:16:17 +0300:

>
> Hi, I saw the announcement for PAL, but only now can I spend some time
> on it.  I would be interested in being able to get a framebuffer
> capture without needing an external third party program (or anyone
> present at the keyboard).  A quick look over the html manual doesn't
> show a heading with that capability, anything planned?  Seems like
> some of the graphical state functions could be `adjusted to this
> feature.
>
> TIA
> r
>
> _______________________________________________
> Pal-devel mailing list
> Pal-devel at common-lisp.net
> http://common-lisp.net/cgi-bin/mailman/listinfo/pal-devel

Currently there is not any functionality to do it directly, but it should  
be possible with the SCREEN-TO-ARRAY(1) (not mentioned in the "manual"  
since it is badly out of date at the moment... look at  
examples/images.lisp) function. You'll just need the code to export the  
image in the desired format.
Having an array-to-<format> would be nice but I'm not yet sure how to  
implement it. It would probably be best to use some other cl library to do  
the exporting instead of reinventing the wheel but I dont like the idea of  
adding library dependancies without a good reason.


(1)(SCREEN-TO-ARRAY pos-vector width height) returns a region of the  
backbuffer as an 2d array of (r g b a) lists. Let me know if you try it  
and have any problems since it is not that well tested yet.

-- 
tomppa


From fph at clouddancer.com  Mon Sep 10 04:02:58 2007
From: fph at clouddancer.com (GP lisper)
Date: Sun,  9 Sep 2007 21:02:58 -0700 (PDT)
Subject: [Pal-devel] Screen Capture Function
In-Reply-To: <op.tx9w6ntzu6rk5c@otto> (flatlander@yellow-hut.com)
References: <20070906221617.7BFAF20C13A@mail.clouddancer.com>
	<op.tx9w6ntzu6rk5c@otto>
Message-ID: <20070910040258.3349B20C13B@mail.clouddancer.com>


   Date: Fri, 07 Sep 2007 10:45:49 +0300
   From: "Tomi Neste" <flatlander at yellow-hut.com>
   Organization: Yellow Hut Games

   GP lisper <fph at clouddancer.com> kirjoitti Fri, 07 Sep 2007 01:16:17 +0300:

   > on it.  I would be interested in being able to get a framebuffer
   > capture without needing an external third party program (or anyone

   Currently there is not any functionality to do it directly, but it should  
   be possible with the SCREEN-TO-ARRAY(1) (not mentioned in the "manual"  

Yes, I had seen that.  Alas I am having startup problems, seem to not
find the supporting libs.  I'm working thru the CFFI tutorial,
modifying it to match into PAL to see where the problem might be.



From flatlander at yellow-hut.com  Tue Sep 11 18:41:40 2007
From: flatlander at yellow-hut.com (Tomi Neste)
Date: Tue, 11 Sep 2007 21:41:40 +0300
Subject: [Pal-devel] Screen Capture Function
In-Reply-To: <20070910040258.3349B20C13B@mail.clouddancer.com>
References: <20070906221617.7BFAF20C13A@mail.clouddancer.com>
	<op.tx9w6ntzu6rk5c@otto>
	<20070910040258.3349B20C13B@mail.clouddancer.com>
Message-ID: <op.tyh57qwuu6rk5c@otto>

GP lisper <fph at clouddancer.com> kirjoitti Mon, 10 Sep 2007 07:02:58 +0300:

>
>    Date: Fri, 07 Sep 2007 10:45:49 +0300
>    From: "Tomi Neste" <flatlander at yellow-hut.com>
>    Organization: Yellow Hut Games
>
>    GP lisper <fph at clouddancer.com> kirjoitti Fri, 07 Sep 2007 01:16:17  
> +0300:
>
>    > on it.  I would be interested in being able to get a framebuffer
>    > capture without needing an external third party program (or anyone
>
>    Currently there is not any functionality to do it directly, but it  
> should
>    be possible with the SCREEN-TO-ARRAY(1) (not mentioned in the "manual"
>
> Yes, I had seen that.  Alas I am having startup problems, seem to not
> find the supporting libs.  I'm working thru the CFFI tutorial,
> modifying it to match into PAL to see where the problem might be.
>
> _______________________________________________
> Pal-devel mailing list
> Pal-devel at common-lisp.net
> http://common-lisp.net/cgi-bin/mailman/listinfo/pal-devel

If you are having problems with loading the (foreign?) libs let me know if
it looks like bug in PAL.
And in case you are running on linux you might also need to install the
developer packages for the sdl libs, at least ISTR that was the case on my
Ubuntu box.

When I get the time I'll check out the available CL image handling
libraries and add some sample code for exporting the PAL image arrays to a
file.

-- 
tomppa